Traditionally, scholars count up to ten case forms in Lithuanian. However, at least one case is reduced to adverbs, and another is extinct in the modern language. So the official variant of Lithuanian has seven cases, and an eighth case is used in some dialects and reduced to an adverb in others. The main cases are:

Lithuanian has two main grammatical numbers: singular and plural. There is also a dual, which is almost unused, though a few words retain their dual forms. Although grammatically the dual number can be applied to any word, in practice it was used quite sporadically during the last century. The singular and the plural are used similarly to many European languages. Singular, plural and dual inflections of the same case always differ among themselves; no rule dictates how to form, for example, the plural inflection from the singular of the same case.

Lithuanian nouns have five declensions which are defined by the inflection in singular nominative and genitive cases. Only a few borrowed words, like taksì – taxi, tabù – taboo, kupė̃ – compartment (in a train), coupé, are not subject to declension.

Inflection in singular cases

Examples

Notes

Nominative

Genitive

Nominative

Genitive

Meaning

I

-as, -is, -ys, -ias

-o

výrasmẽdistraukinỹssvẽčias

výromẽdžiotráukiniosvẽčio

man; husbandtreetrainguest

Main pattern for masculine nouns

II

-a, -i¹, -ė

-os, -ės

žmonàšviesàvárnapradžiàsáulė

žmonõsšviesõsvárnospradžiõssáulės

wifelightcrowbeginningsun

Main pattern for feminine nouns; few masculine

III

-is²

-ies

móteris³ fpilìs favìs fdantìs m

móteriespiliẽsaviẽsdantiẽs

womancastlesheeptooth

Rarer, feminine nouns, fewer masculine

IV

-us

-aus

žmogùssūnùsmedùsskaĩčius

žmogaũssūnaũsmedaũsskaĩčiaus

humansonhoneynumber; digit

Rare, masculine nouns

V

-uo, -ė³

-en-s, -er-s f

vanduõakmuõskaitmuõsesuõduktė̃

vandeñsakmeñsskaitmeñsseser̃sdukter̃s

waterstonedigitsisterdaughter

Rare, masculine nouns, four³ feminine; suffixed by -en- m and -er- f.

There are only two nouns ending in -i: pati 'wife' and marti 'daughter-in-law'. Their declension is the same to the second adjective feminine declension and similar to a second feminine noun palatalized declension. The noun pati is the same to a pronoun pati 'herself; myself f; itself (for feminine nouns)'

Exception: petys m – shoulder, peties, etc. after this declensional pattern. This declension is very similar to the fifth declension.

Duktė 'daughter' is the only word of the fifth declension not having the ending "uo". A word moteris 'woman, female' often has a genitive móters; the plural genitive of moteris is moterų (not palatalized -ių); it is the only normal form for the fifth declension and one of the two (the main is -ių) for the third. The more two words, obelis f – apple tree and dieveris m – (older) brother-in-law, are the same declensional case as moteris, but dieveris, being masculine possibly has a sg. inst. -iu. Dieveris is also the only -er- masculine case. There was also possibly a word broteris – brother (modern brolis) in old Lithuanian.

Nouns having -j- before an ending -as, vėjas – wind, vertėjas – translator (versti – translate; convert; subvert etc.), naudotojas – user (naudoti – to use), vartotojas – consumer (vartoti – to consume) have vocative -au: vėjau, vertėjau, naudotojau, vartotojau. Feminine counterparts for agent's words are vertėja, naudotoja, vartotoja and their vocative is the same to nominative. If naudotojas would have and ending -e for vocative it would sound same to feminine: naudotoja = *naudotoje (ja = *je, which is not used combination, because all vowels succeeding j are soft). Sg. locative of these words have -yje or -uje (-uje appears where it is needed for easier pronunciation): naudotojuje, vėjyje.

There are only a few words with the ending -ias (sg. nom.), historically they are related with -ys words; -ias words have -y in vocative: svečias – svety (guest); kelias – kely (road); some can have fifth-declension-like ending -iau for vocative: velnias – velniau (devil). In dialects an inflection -iau in vocative can be used, for example, for names ending in -is: Algis – Algiau (dial.) instead of Algi. A word brolis besides a paradigmatic vocative broli has also a form brolaũ.

Each Lithuanian consonant (except [j]) has two forms: palatalized and non-palatalized ([bʲ]-[b], [dʲ]-[d], [ɡʲ]-[ɡ] and so on). The consonants preceding vowels [i] and [e] are always moderately palatalized.

The letter i represents either the sound similar to i in the English lit or is a palatalization marker – softens the preceding consonant (ia = like e, iu = ü, io = ö; all samples where i is a softhening marker are ia (ią), iu (iū, ių), io). But ie is a diphthong and there are no combinations ię and iė. Other diphthongs are: uo, ai, ei, oi (this one is used only in foreign words; in Lithuanian-derivation it is present when a word kojinė 'sock, stocking' is pronounced shorter as koinė), ui, au (palatalized iuo, iai, iui, iau; there is no iei combination because ei is already soft and same to iai; a combination ie is only a diphthong and in use is succeeded by a consonant).

Feminine nouns ending in -a, and masculine ending in -us has their palatal forms: -ia, -ius (the latter is declined in the first paradigm in its plural). The nominative singular ending -ias (sg. nom.; the first paradigm) alone is a palatal variant of -as, but -ias pattern, differently from -ia, -ius, are not palatalized counterpart for -as (unpalatalized equivalent in sg. nominative) and there is no palatalized counterpart for -as type. The -ias pattern is a type of -ys pattern, its words are declined like -ys words, except sg. nom. -ias and, for some of the words, vocative -iau. There are only a few words of -ias type.

There are two consonants in Lithuanian, d and t, which become respectively dž [dʒ] and č [tʃ] when precedes a palatalization marker i (so, this does not include the softer sounds: i, į, y, ie, ė, e, ę) and they still have to be pronounced softer, like all other consonants preceding the palatalization marker. Examples: masc. sg. nom. svẽčias 'guest', fem. sg. nom. valdžià 'power (on somebody); government', m. sg. nom. skaĩčius 'number'; pavyzdỹs 'example', pãvyzdžio, pãvyzdžiui, pãvyzdį; kėdė̃ 'chair', kėdžių̃ etc.

III. Examples: pilìs f – castle, vagìs m – thief. There are many nouns of this paradigm which have -ų in pl. gen.: žąsìs f – žąsų̃ 'goose', naktìs f – naktų̃ 'night', debesìs m – debesų̃ 'cloud'. This declension is very similar to the fifth, except the singular nominative, genitive, instrumental and plural genitive for a part of nouns.

V. Nouns of this paradigm has a sg. nom. ending -uo and a suffix -en- in the other cases. Examples: vanduõ – water, akmuõ – stone. Words made with a suffix -m-: duomuõ 'a single item of a data' ← duoti 'to give', skaitmuõ 'digit' ← skaičiuoti 'to count, calculate'. There are two feminine nouns of the fifth declension, sesuõ – sister and duktė̃ – daughter, the second with an irregular ending. A word moteris – woman, having the same suffix as duktė and sesuo is declined in the third declension.

A noun pati has the same form to a pronoun pati 'herself; myself (feminine); itself (for feminine nouns)'. There are only two nouns ending in -i: pati 'wife' and marti 'daughter-in-law'. Their declension is same to the second adjective feminine declension.

In Lithuanian language adjectives have three declensions determined by the singular and plural nominative case inflections. Adjectives are matched with nouns in terms of number, gender, and case. Unlike nouns, which have two genders – masculine and feminine – adjectives have three (except -is, -ė adjectives), but the neuter adjectives (the third example in the table) have only one uninflected form.

Most of the first type adjectives of the third declension are with the suffix -in-. These are easily made from nouns, adjectives, by adding the suffix -in-. When made from verbs, they are mostly made from a past passive participle: vìrti – to boil, vìrtas – boiled, virtìnis – which is boiled, made by boiling. Consequently, the suffix is -t-in- for such adjectives. These variants of verbal derivation easily become nouns, in this case it is a noun virtìnis – dumpling (with mushrooms; curd; etc.; but dumplings with meat are called koldūnai). There are also some other word types having certain suffixes or prefixes in this declensional group: (of the first accentuation pattern) pern-ykšt-is – of yesteryear (pernai - in yesteryear); apy-geris – goodish, around good; po-geris – around good; prie-kurtis – somewhat deaf; (of the second accentuation pattern) ketvirt-ain-is, viln-on-is – woollen, graž-ut-ėl-is, rug-ien-is, maž-yl-is – tiny tot, ger-ul-is – goody, maž-ut-is – smally.

Masculine adjectives of the III-rd paradigm are of two types, they differ in plural nominative and dative: varinis – copper, brazen, laukinis – wild have pl. nom. variniai, laukiniai and pl. dat. variniams, laukiniams; an example of the second type: didelis (big), dideli in pl. nom. and dideliems in pl. dat.

Note that the table contains only the objective genitive of pronouns aš, tu, savęs. The possessive genitives of these words are mano, tavo and savo respectively. Compare jis manęs laukia – 'he waits for me' and mano draugas – 'my friend' ('friend' is in masculine), but in jis mūsų laukia – 'he waits for us' and mūsų draugas – 'our friend', the two genitives coincide as in almost any word.

Duktė – daughter, and sesuo – sister, are the only two feminine words of the fifth declension, they have the suffix -er- in the other cases. One word, moteris – woman, female, is both of the fifth and the third declensions, because it has variant genitive singular, both variants of which (-s and -ies) are equally apt, and it has a gen. pl. -ų. Two more words, dieveris m (older) – brother-in-law, and obelis f – apple tree, are the same case as moteris. The word dieveris, -ies (-ers) m, having more close meaning to a proper one, possibly has the fifth-type-like masculine singular instrumental (dieveriu), which is taken from the first declension, while the words of the third declension have -imi (dantimi, vagimi), without a gender distinction. But -imi is normal as well for the masculine nouns of the fifth declension, for example – akmenimi / akmeniu.

A word šuo – dog, differs from the other -uo words in that, that its stem is mixed with the suffix -uo and it consequently does not have the suffix -en- in the other cases (š-uo, akm-uo; šu-n-į, akm-en-į), its singular instrumental normal ending is of the third type (šunimi; that can be understood as a part of a meaning: more like an indefinite gender) and its accentuation paradigm is fourth, the sole case for the -uo words.

Mėnuo – month, moon, is of the first declension -is type, the only fifth type form is one of the two equal variants of singular nominative: mėnuo (other is mėnesis); genitive is mėnesio etc.

The word žmogus – man, human, historically had the nominative singular žmuo (compare Latin homō). Today žmogus is declined in the fourth paradigm in singular (žmogus, žmogaus etc.) and in the third -ė paradigm in plural (žmonės, žmonių etc.).

The words pats m, pati f – one/my/him/her/itself (also noun meanings: husband and wife) have also peculiarities. The ending -i (f., sg. nom.) is present only in two words: pati and marti – daughter-in-law. Pats (< patis) is of the third adjectival declensional type, but the singular nominative is different (-s < -is), plural nominative is -ys and the singular genitive -ies, like in nouns of the third declension. Its sg. gen. is also often said pačio.

The words of the third declension (-is, -ies) have either -ių or -ų in the genitive plural. The dative singular, similarly to the fifth declensional type, differs depending on the gender (-iai f, -iui m), the instrumental singular, differently from the fifth type, is the same for the both genders. One noun of the third type, petys, peties, has the sg. nom. ending with a long i: -ys. Some of the words having the suffix -uonis (there are few of such words) have parallel forms in the other declensions: palikuonis, -ies (common gender) and palikuonis, -io m, palikuonė, -ės f. Such change can happen after the change of an accent place: if the word is accented on the ending -is, then the change of declension (-is, -ies > -is, -io) does not occur in speech, and if the accent moves from the ending to the stem in singular nominative, then the change of declension sometimes occurs. For most of -uonis words, declining in the first declension is considered to be a mistake.

There are few words which are sometimes declined mistakenly in other declensions. But some of the shifts are not rare: a word pats besides sg. gen. paties is often said pačio and these two forms of sg. gen. are equal. Some words have parallel forms from other declensions with a little change in a meaning: dukra, dukros; sesė, sesės; palikuonis, -io, palikuonė, -ės. The forms sesė and dukra are more like unformal, than duktė, -ers and sesuo, -ers. For the word moteris the form motera were existent in dialects, but it is, differently from dukra, sesė cases, only a formal shift of declension without a meaning variation and such word would be perceived as a vernacularism and obsolete.

The forms from the two more declensions sometimes occur in a speech for the masculine words of the fifth declension: of the third and of the first declensions. Similar case is with the masculine words of the third declension – they are sometimes declined in the first declension (because singular nominative is the same). Such a shift is a mistake of declension. For example, a word akmuo, akmens can have the forms (third d.) (sg. nom., sg. gen.) akmenis, akmenies – more like older dialectal not used widely and a little likely to be heard in a speech – and (first d.) akmenis, akmenio; akmenys, akmenio; akmenas, akmeno – sometimes said by the speakers, who don't know the fifth declension well, for example, children. But these variants are possibly also present as dialectal forms. The other examples which are sometimes used by some, but not fit are: rudenio (rudens), šunio (šuns, šunies) etc. Examples of migrants from the third declension (-is, -ies) are, for example, dantis, dančio instead of dantis, danties. Such use like akmenas, akmeno; dančio; šunio; rudenio; is a clear mistake and is not accepted. A case of petys, pečio instead of petys, peties is also a mistake, but petys is the only one -ys (instead of -is) form declined in the third declension and consequentely tends to be declined like all other -ys words (of the first declension).

For the word mėnuo / mėnesis the proper form is sg. gen. mėnesio etc. (sg. gen. mėnesies is known in dialects). The genitive of the word pats is paties, but it is also frequently said pačio. Some of the cases of the word pats are of the third adjectival declension, some – sg. nom. -s (< -is), sg. gen. -ies (also -io, like in respective adjectives) and pl. nom. -ys – of the third noun declension.

Some of the nouns occur in another declensional type only in one case. All these cases are more like dialectal and older. For example, seseris can be said seseria in dialects, but the genitive remains sesers; (older) motė, moters, but also a migrant form: (older) motė, motės. The dialectal and older form sesuva (a type of sesuo), for example, can remain in the original paradigm with sg. gen. sesers or shift to the -a declension: sesuva, sesuvos.

In the tables below the words from the fifth and the third declensions are compared with the words from the other declensions. Table cells with the correct forms written are coloured (not white). In the right outside column the variant forms within the fifth and third declensions are given. They are older, dialectal and not used or used only in small areas. For example, among the variant forms of singular nominative sesuo within the fifth declension are archaic sesuoj, sesuon, sesuva. The first column is for the words of the fifth (-uo, -ens / -ers) declension and the second for the third (-is, -ies). These declensions are very similar. The words are given in the same column, when the forms are same. The column to the right from these, are for the forms of the first (-as, -is, -ys, -ias) and second (-a (-ia), -ė) declensions; one word, žmogus, is of the fourth in singular.

The proper forms of the word mėnuo / mėnesis is not of the fifth-third declension and the same is with the word žmogus, which historically had the form žmuo. A word judesys – move, is included for comparison with mėnesis (they have the same suffix -es- and are declined in the same declension, except sg. nom. of mėnuo / mėnesis).

Dukra and sesė are variants of duktė, sesuo of a different declension and meaning – dukra and sesė are more like informal.

A word palikuonis has two forms of different declensions: one of the third (original) – palikuonis, and other shifted to the first declension – palikuonis, -io palikuonė, -ės. There are few of -uonis words and only several of them have forms other than the original declension, but in a speech some of them are also sometimes declined in the first declension, for example, geluonis, -ies c – sting, can be understood as geluonis, -io m.

For the -uo words (except mėnuo) and the -is words (like dantis) the shift to the other declensions would be a mistake. When the shift is from the fifth to the third declension it can be understood as minor variation, but the shift to the first declension would be a clear mistake (however, some of the cases are the same, and that is one of the reasons why the shift can occur). But in speech some of the speakers say, for example, rudenio instead of rudens (this can come on dialectal base), dantis, dančio instead of dantis, danties. Besides these cases, there are shifts, which occur commonly in a speech: pačio instead of paties, pečio instead of peties (the original variants are not used less). A word šuo can also be said šuva (one of dialectal variants).

The words rūgštìs f 3 (1) – acid, and rū̃gštis 2 – sourness; acidity, are two words of different declensions, their meanings are different, but related.

adjectives of the third declension (masculine forms, palatalized sub-paradigm)

all pronouns (masculine forms), except the pronoun pats – 'own, self'

all passive (the main sub-paradigm) or active (the palatalized sub-paradigm) participles (masculine, - active participles have their specific nominatives)

all ordinal numbers (masculine forms, adjective inflections)

significant part of cardinal numbers (masculine, see the list below)

The a-paradigm is the most complex declension paradigm in Lithuanian. It has two different sub-paradigms, one of which is the main paradigm. The second sub-paradigm is called "palatalized", which means that the last consonant of the stem before the inflection is always palatalized. Note that in this case the palatalization mark (the letter "i") is marked as a part of the inflection. The a-paradigm is masculine.

Also note, that inflection of the a-paradigm is different for nouns, adjectives, and pronouns in some cases. However, not every pronoun is declined, using the inflections from the pronoun column in the table below. Some pronouns as well as every numeral of the a-paradigm use the inflections from the adjective column.

The inflection of noun for singular nominative can be -is, -ys or -ias, depending on word. Pronouns however always have the inflection -is, but adjectives never have -ys in this case.

The inflection in singular accusative depends on the inflection in singular nominative. If the singular nominative ends with -ias, a word has -ią in singular accusative, otherwise it has the inflection -į.

Significant part of adjectives, that end with -is in the singular nominative (adjectives of the third declension), have noun inflections in plural.

The inflection in singular vocative follows the inflection of the singular nominative too:

Short forms of the nominatives skip the active participle suffix -(i)ant-, e. g. miegantis 'sleeping' (masculine singular, the long form) - miegąs (idem, the short form), sakantys 'saying' (masculine plural, the long form) - saką (idem, the short form). This is valid in the masculine nominative only.

The u-paradigm has two different sub-paradigms, the main and the palatalized. Note, that in this case the palatalization mark (the letter "i") is marked as a part of the inflection. The u-paradigm is masculine.

Inflections of the u-paradigm differ between nouns and adjectives in some cases.

Other cases than the singular nominative always have a suffix, -en- for masculine words and -er- for feminine words. There are only two feminine words, using the suffixed sub-paradigm, duktė - 'daughter' and sesuo - 'sister'.

Irregularities:

A word duktė - 'daughter' has the inflexion -ė instead of -uo in singular nominative.

A word šuo - 'dog' has a suffix -un- instead of -en-. The root of this word formally is a single š-, but historically it was šu-, that subsequently amalgamated with the suffix, and the further cases are šuns, šuniui, šunį and so on.

Other:

A word sesuo - 'sister' has a synonimsesė, that's used in vocative ('sese!') more often, than the first ('seserie!'). The synonym sesė is of the ė-paradigm.

Inflections, that have two or more syllables, are often shortened in Lithuanian, eliding the final short vowel. Shortened inflections are especially used in the spoken language, while in the written language full inflections are preferred. The elision occur in:

Singular locative. Inflections -ame, -yje, -oje, -ėje may be shortened to -am, -y(j), -oj, -ėj. Note, that a one-syllable inflection -e of the a-paradigm isn't a subject of the rule.

Plural dative has one-syllable inflections, but sometimes they are shortened, skipping the final -s, to -am, -iem, -om, -ėm, -im. These inflections coincide with respective inflections of the dual number too.

Plural locative. A masculine inflections -uose may be shortened to -uos. What however doesn't pertain to inflections -yse, -ose, -ėse, whose shortened variants would coincide with inflections of other cases.

Also there's just one occasion, when the whole one-syllable inflection may be skipped. This may be done with feminine active participles of the past tense (or of the past iterative tense) in the singular nominative. So a word dariusi - 'who was making, who has made' can be said as darius. Note, that this shortened form coincides with the sub-participle of the past tense.

The declension of Lithuanian nouns of the different declensional patterns are given compared with Latin, Sanskrit, Latvian (in a separate section), Old Prussian, Gothic,
Ancient Greek and Russian. Because Old Prussian has left a limited literature with not all the cases of all the stems employed, the Prussian samples are not full in the tables (the cases which existed are most probably already reconstructed from various data by linguists). At the same time there were fewer cases in Prussian than in modern common Lithuanian and mixing the declension patterns was more common, what could develop in a context of a slow decline in the use of Old Prussian, as the Prussians adopted the languages of the others, particularly German. Lithuanian declension varied in dialects.

Nom.

Gen.

Dat.

Acc.

Inst.

Loc.

Voc.

Nom.

Gen.

Dat.

Acc.

Inst.

Loc.

wolf

father

day

man

wolf

vil̃kas

vṛ́kas

lupus

tavs

dags

ἄνθρωπος

волк

vil̃ko

vṛ́kasya

lupī

tavas

dagis

ἀνθρώπου

во́лка

vil̃kui

vṛ́kāya

lupō

tavu

daga

ἀνθρώπῳ

во́лку

vil̃ką

vṛ́kam

lupum

tavan

dag

ἄνθρωπον

во́лка

vilkù

vṛ́keṇa

(lupō)

во́лком

vilkè

vṛ́ke

(in lupō /-ī)

в во́лке

vil̃ke

vṛ́ka

lupe

dag

ἄνθρωπε

(во́лче)

vilkaĩ

lupī

tavai

dagōs

ἄνθρωποι

во́лки

vilkų̃

vṛ́kāṇām

lupōrum

tavan

dagē

ἀνθρώπων

волко́в

vilkáms

vṛ́kebhyas

lupīs

tavamans

dagam

ἀνθρώποις

волка́м

vilkùs

vṛ́kān

lupōs

tavans

dagans

ἀνθρώπους

волко́в

vilkaĩs

vṛ́kais

(lupīs)

волка́ми

vilkuosè

vṛ́keṣu

(in lupīs)

в волка́х

language

star

gift

army

country

kalbà

lingua

lauksno

giba

στρατιά

страна́

kalbõs

linguae /-ās

lauksnos

gibōs

στρατιᾶς

страны́

kal̃bai

linguae

lauksnai

gibái

στρατιᾷ

стране́

kal̃bą

linguam

lauksnan

giba

στρατιάν

страну́

kalbà

linguā

страно́й

kalbojè

in linguā /-ae

в стране́

kal̃ba

lingua

στρατιά

(стра́нo)

kal̃bos

linguae /-ās

lauksnos

gibōs

στρατιαί

стра́ны

kalbų̃

linguārum

lauksnun

gibō

στρατιῶν

стран

kalbóms

linguīs /-ābus

lauksnomans

gibōm

στρατιαῖς

стра́нам

kalbàs

linguās

lauksnans

gibōs

στρατιάς

стра́ны

kalbomìs

linguīs /-ābus

стра́нами

kalbosè

in linguīs

в стра́нах

The first declension. Sg. nom. ends in -as, sg. acc. – in -ą. Latin words of this stem ends in -us in sg. nom., and -um in sg. acc. When these Latin endings succeeded a labial sound, their vowel was originally ŏ: equos – horse, equom; servos – slave, serf, servom. Sg. nom. in Prussian and Gothic is shortened: tavs, dags. Such shortening is present in western and northern Lithuanian dialects: tėvas, -o – father, and tėvs, -o; dagas, -o – heat of the sun (from degti – to burn), and dags, -o. In Prussian there existed only a shortened form, and it developed one step further in a part of the nouns: kaimis / kaimⁱs – village < kaims < kaimas (Lith. kaimas – village, kiemas – yard). There are no neuter nouns in Lithuanian and Latvian, differently from the other given here: Lith. butas – flat, living place, Prus. butan – the same meaning, Lat. aedificium – building. Lithuanian instrumental -u derives from an older -uo, what is seen, for example, in pronominal (definite) adjective forms, pronouns: gerù (nom. sg. gẽras – good) and gerúo-ju (nom. sg. geràsis – that good one), juõ (nom. sg. jis / is – he). Lithuanian diphthong uo corresponds to Latin ō. For dat. sg., an ending -uo is also known in dialects. Lithuanian acc. sg. and gen. pl. are written in the letters with an ogonek: ą and ų. An ogonek indicates that the sound is long. Historically these sounds were nasal: vilką < vilkan, vilkų < vilkun. The form with a sound -n is used in some places in north-west Samogitia today. Latin pl. dat.-abl. -īs corresponds to Ancient Greek pl. dat. -ois and Lithuanian pl. instr. -ais. Lithuanian sg. gen. corresponds to Slavic, for example, Russian: vilko (also dial. vilkā) and Russian во́лка. Prussian sg. loc. was probably -ai, -ei: bītai (adverb) – in the evening, kvei – where;[1] compare Lith. namiẽ – at home (namè – in the house).

The second declension. Lithuanian and Prussian o denotes a long ō. Narrowed more, it becomes ū. When more open, it is ā; ā was used in Catechisms in Prussian, o – in Elbing vocabulary. The ą, ę correspond to ų, į in dialects of eastern Lithuania and acc. sg. is kalbų (kalbą), gėlį (gėlę) in these dialects. The case of -ų corresponds to Latvian and Slavic languages: nom. sg. liepa (Lith.) – linden, liepa (Latv.), ли́па / lipa (Rus.) and acc. sg. liepą and liepų (Lith.), liepu (Latv.), ли́пу / lipu (Rus.).

The fourth declension. Prussian sg. nom. -us is known from Elbing vocabulary, it was shortened to -s in Catechisms. Sg. gen. -us is an innovative form, known from Catechisms, the older form was -aus. A word сынъ is given in Old Slavonic cases.

The second declension, -ė type. Prussian -ē stems became -i in an unaccented position.